Untitled

<html>
<head>
    <script type ="text/javascript">
var add=null;

function throw() {
var artist = document.getElementById("artist").value;
var title = document.getElementById("title").value;
var label = document.getElementById("label").value;

newRow = document.createElement("tr onclick='showRow(this)");
newRow.innerHTML = "<td>" + artist + "</td>" + "<td>" + title + "</td>" + "<td>"
        + label + "</td>";
add = document.getElementById("tabelkaa");
add.appendChild(newRow);
}
function showRow(x) {
alert("Row index is: " + x.rowIndex);
}
window.onload = function () {
var plus = document.getElementById("plus");
plus.addEventListener("click", throw);
}
</script>

</head>
<body>
        <div id="info">
            <p>Artist <input type ="text" id="artist"> </p>
            <p> Title <input type ="text" id="title"> </p>
            <p>Label <input type ="text" id="label"> </p>

            <input type="submit" value="-" id="minus">
            <input type="submit" value="+" id="plus"> <br/>
        </div>
        <div id ="tabelka">
            <table id="tabelkaa" border="5">
            </table>
        </div>
</body>